Lens cover with lens element, lighting module and lamp

Abstract

The utility model discloses a lens cover with a lens element, a lighting module and a lamp. The lens cover includes: a substrate; and an optical lens element extending from the substrate and defining a center of focus, the optical lens element comprising an outer surface and an inner surface, the outer surface comprising: a first transverse two-dimensional profile at a cross-section taken orthogonally to the length at the center of focus, the first transverse two-dimensional profile includes a pair of second curved profiles extending from the focus center and each second curved profile having a second radius of curvature; the inner surface includes a third curved profile that is substantially spherical crown-shaped, the third curved profile having a third radius of curvature, and the third radius of curvature is less than the second radius of curvature.

Description

Technical Field

[0001] The utility model belongs to the technical field of LED lamps, and in particular relates to a lens cover with a lens element, a lighting module and a lamp. Background Art

[0002] Animal and plant supplementary lighting is a kind of lamp that uses light instead of sunlight to provide the light source required for the growth and development of animals or plants in accordance with the natural laws of animal or plant growth. For example, plants need light for photosynthesis during their growth process, and currently incandescent lamps or LED lamps are commonly used.

[0003] In order to adapt the LED lamp beads to the currently used LED lamps, a lens cover is generally required to achieve secondary light distribution. After searching, Patent Document 1 (CN216113848U) discloses a lens cover for multiple light-emitting devices, which can be used for indoor plant supplementary lighting. The optical lens element of the lens cover includes an inner surface. In order to achieve the requirement of light transmission, the inner surface has a longitudinal two-dimensional profile and a transverse two-dimensional profile, and the longitudinal two-dimensional profile has a curved profile and the transverse two-dimensional profile has a different radius of curvature. The two-dimensional structure of the above inner surface constitutes a cavity for accommodating the lamp beads. However, the spatial volume of the cavity is small, and the lens elements are arrayed on the substrate in an integrated manner. Therefore, it is necessary to first open a groove on the back of the substrate, and then press it with a customized mold. The operation process is cumbersome, which brings inconvenience to production and processing and reduces production efficiency. Summary of the invention

[0004] 1. Problems to be solved

[0005] In view of the technical problem that the cavity formed by the two-dimensional structure of the above inner surface is inconvenient to produce and process, the purpose of the utility model is to provide a lens cover with a lens element, optimize the structure of the lens cover, and improve production efficiency.

[0006] Another object of the utility model is to provide a lighting module with a lens cover.

[0007] Another object of the present invention is to provide a lamp having the lighting module.

[0008] 2. Technical solution

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] The first aspect of the present invention aims to provide a lens cover with a lens element, which comprises: a substrate; and an optical lens element extending from the substrate and defining a focal center, wherein the optical lens element comprises an outer surface and an inner surface.

[0011] The outer surface comprises:

[0012] a first transverse two-dimensional profile at a cross section taken orthogonally to the length at the focal center, the first transverse two-dimensional profile comprising a pair of second curved profiles extending from the focal center and each second curved profile having a second radius of curvature;

[0013] The inner surface includes a third curved profile that is substantially spherical cap-shaped, the third curved profile having a third radius of curvature, and the third radius of curvature is smaller than the second radius of curvature.

[0014] According to any embodiment of the first aspect of the purpose of the utility model, the outer surface also includes: a first longitudinal two-dimensional profile at a cross section taken orthogonally to the width at the center of the focal point, the first longitudinal two-dimensional profile including a central profile and a pair of first curved profiles extending from the central profile, the central profile being concave and cooperating with the first curved profile convex.

[0015] According to any embodiment of the first aspect of the purpose of the utility model, the outer surface also includes: a first longitudinal two-dimensional profile at a cross section taken orthogonally to the width at the center of the focal point, the first longitudinal two-dimensional profile including a center profile and a pair of first curved profiles extending from the center profile, the center profile having a center radius of curvature, and each of the first curved profiles has a first radius of curvature, and the third radius of curvature is smaller than the center radius of curvature and larger than the first radius of curvature.

[0016] According to any implementation scheme of the first aspect of the purpose of the utility model, the outer edge of the third curved profile is formed with an inclined flare and extends to the plane where the substrate is located.

[0017] According to any embodiment of the first aspect of the object of the present invention, the optical lens element has a substantially rectangular shape when viewed along the focal center, but with rounded corners.

[0018] According to any implementation scheme of the first aspect of the purpose of the utility model, the outer contour of the substrate is square, and avoidance grooves are arranged on it, and the avoidance grooves are distributed in the array of optical lens elements.

[0019] According to any implementation scheme of the first aspect of the present invention, the lens element has a length and a width, and a distance D1 between two adjacent lens elements in the length direction is smaller than a distance D2 between two adjacent lens elements in the width direction.

[0020] According to any embodiment of the first aspect of the present invention, the ratio of the distance D1 between two adjacent lens elements in the length direction to the distance D2 between two adjacent lens elements in the width direction is 1:1-5, preferably 1:1, 1:2, 1:3, 1:4 and 1:5.

[0021] According to any implementation scheme of the first aspect of the purpose of the utility model, at least one control box mounting groove is provided on the substrate.

[0022] The second aspect of the present utility model aims to provide a lighting module, comprising: an inner housing;

[0023] A lamp board having a plurality of LED lamp beads assembled with the inner shell;

[0024] And the lens cover described in the first aspect covers the light board.

[0025] The third aspect of the present utility model aims to provide a lamp, comprising: an outer shell, and the lighting module described in the second aspect placed on the outer shell.

[0026] 3. Beneficial effects

[0027] Compared with the prior art, the beneficial effects of the utility model are:

[0028] The lens cover with lens elements of the utility model has a cavity on its inner surface which is basically in the shape of a spherical crown, and the mold structure is simple. A cavity adapted to the lamp beads can be formed on the substrate by a one-time pressing molding method. At the same time, the structure of the lens cover is optimized so that the lens cover can meet the light output requirements under different conditions. In addition, the optimization of the structure also effectively improves the production efficiency of the lens cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The technical solution of the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for the purpose of explanation and are not intended to limit the scope of the utility model. In addition, unless otherwise specified, these drawings are only intended to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0030] Figure 1 This is a schematic diagram of the structure of a lens cover with a lens element according to Embodiment 1 of the present utility model;

[0031] Figure 2 It is a front view of a lens cover with a lens element according to Embodiment 1 of the present utility model;

[0032] Figure 3 It is a rear view of the lens cover with lens element according to Embodiment 1 of the present utility model;

[0033] Figure 4 for Figure 3 Section view along line AA;

[0034] Figure 5 for Figure 4 Sectional view along line BB;

[0035] Figure 6 It is a front view of a lens cover with a lens element according to Embodiment 2 of the present utility model;

[0036] Figure 7 for Figure 6 A partial enlarged view of

[0037] Figure 8 It is a cross-sectional view of a lens cover with a lens element along the length direction of Example 2 of the utility model;

[0038] Fig. 9 It is a three-dimensional structural schematic diagram of the lamp of the utility model;

[0039] Fig.10 This is the front view of the lamp of the utility model;

[0040] Fig.11 This is a plane light distribution curve of a lens cover having a lens element in Example 1 of the utility model;

[0041] Fig.12 This is a planar light distribution curve of a lens cover having a lens element according to Example 2 of the present invention.

[0042] Reference numerals:

[0043] 10. Outer shell; 20. Lighting module; 30. Inner shell; 40. Light board; 50. Lens cover; 51. Base plate; 511. Avoidance groove; 512. Control box mounting groove; 52. Lens element; 521. Outer surface; 522. First transverse two-dimensional contour; 523. Second curved contour; 524. Inner surface; 525. Third curved contour; 526. First longitudinal two-dimensional contour; 527. Center contour; 528. First curved contour; 529. Inclined flaring. DETAILED DESCRIPTION

[0044] The present disclosure may be more easily understood by reference to the following description in conjunction with the accompanying drawings and examples, all of which constitute a part of the present disclosure. It should be understood that the present disclosure is not limited to the specific products, methods, conditions or parameters described and / or shown herein. Further, the terms used herein are only used for the purpose of describing specific embodiments by way of example and are not intended to be limiting unless otherwise stated.

[0045] It should also be understood that, for the sake of clarity, certain features of the present disclosure may be described herein in the context of separate embodiments, but may also be provided in combination with each other in a single embodiment. That is, unless clearly incompatible or specifically not included, each separate embodiment is considered to be combinable with any other embodiment, and the combination is considered to represent another different embodiment. Conversely, for the sake of simplicity, the various features of the present disclosure described in the context of a single embodiment may also be provided individually or in any sub-combination. Finally, although a particular embodiment may be described as part of a series of steps or part of a more general structure, each step or substructure itself may also be considered to be an independent embodiment.

[0046] Unless otherwise indicated, it should be understood that each individual element in a list and each combination of individual elements in the list will be interpreted as a different embodiment. For example, a list of embodiments represented as "A, B, or C" should be interpreted to include embodiments "A", "B", "C", "A or B", "A or C", "B or C", or "A, B, or C".

[0047] In the present disclosure, the singular forms of the articles "a," "an," and "the" also include the corresponding plural references, and a reference to a specific value includes at least that specific value unless the context clearly indicates otherwise. Thus, for example, a reference to "a substance" is a reference to at least one of that substance and equivalents thereof.

[0048] The terms including ordinal numbers such as "first" and "second" can be used to explain various components or fluids, but these components and fluids are not limited by these terms. Therefore, without departing from the teachings of the present disclosure, these terms are only used to distinguish the component / fluid from another component / fluid.

[0049] When items are described by using the conjunction terms "... and / or...," etc., the description should be understood to include any one of the associated listed items and all combinations of one or more thereof.

[0050] In general, the use of the term "about" indicates an approximate value that may vary depending on the desired properties obtained by the disclosed subject matter, and will be interpreted in a context-dependent manner based on function. Therefore, one of ordinary skill in the art will be able to interpret a certain degree of difference on a case-by-case basis. In some cases, the number of significant figures used when expressing a particular value can be a representative technique for determining the difference allowed by the term "about". In other cases, a gradient in a range of values ​​can be used to determine the range of differences allowed by the term "about". Further, all ranges in this disclosure are inclusive and combinable, and reference to the values ​​stated in the range includes each value within the range.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs; the terms used herein and / or include any and all combinations of one or more related listed items.

[0052] Example 1

[0053] like Fig. 9 , Fig.10 As shown, the lamp for plant supplementary lighting of this embodiment includes: an outer shell 10 made of aluminum alloy (or other replaceable materials), a heat sink is arranged on the back of the outer shell 10, and a lighting module 20 is placed on the outer shell 10.

[0054] The above-mentioned lighting module 20 includes: an inner shell 30; a lamp board 40 with multiple LED lamp beads (commercially available products) assembled with the inner shell 30; and a lens cover 50 covering the lamp board 40. The lens elements 52 on the lens cover 50 correspond to the LED lamp beads one by one, and can be connected to the lamp board 40 by screws or any of various suitable alternative connection arrangements. Through the action of the lens cover 50, the desired redistribution of light emitted from the LED lamp beads can be achieved.

[0055] In order to ensure the normal operation of the LED lamp beads, a rubber strip groove is generally provided on the edge of the lens cover 50. The rubber strip groove has a rubber strip sealing ring built in it. The rubber strip sealing ring is used to achieve sealing between the lamp board 40 and the lens cover 50 to prevent the lamp board 40 from failing due to water ingress.

[0056] Combination Fig.10 As shown, each LED lamp bead can be aligned with a corresponding one of the optical lens elements 52, so that the physical center P of each LED lamp bead is substantially coaxial with the focal center F of the corresponding optical lens element 52, thereby ensuring uniform distribution of light.

[0057] like Figures 1 to 5As shown, the lens cover 50 with the lens element 52 of this embodiment can be an integral one-piece structure formed of an insulating material, such as a polycarbonate material and / or polymethyl methacrylate (PMMA), which is lightweight, low-cost, and highly transparent, and is an ideal material for light guide. The lens cover 50 includes: a substrate 51; and an optical lens element 52, which extends from the substrate 51 and defines a focal center F1 (located at the center of the lens element 52). The lens element 52 has a length and a width, and the optical lens element 52 may include an outer surface 521 and an inner surface 524 (forming a convex structure) spaced apart from each other. The outer surface 521 and the inner surface 524 may both be continuous smooth surfaces without any surface discontinuity (e.g., two or more discrete surfaces visible to the human eye and angled relative to each other).

[0058] like Figure 4 As shown, the optical lens element 52 may have a two-dimensional shape, taken at a cross section orthogonal to the focal center F1, including a length direction and a width direction.

[0059] Further, such as Figure 4 and Figure 5 Said, the outer surface 521 comprises: a first transverse two-dimensional profile 522 (in the width direction of the lens element 52 ) at a cross section taken orthogonally to the length at the focal center F1, the first transverse two-dimensional profile 522 comprising a pair of second curved profiles 523 extending from the focal center F1 and each second curved profile 523 having a second radius of curvature;

[0060] The first longitudinal two-dimensional profile 526 (the length direction of the lens element 52) ​​at the cross section taken orthogonally to the width at the focal center F1, the first longitudinal two-dimensional profile 526 includes a central profile 527 and a pair of first curved profiles 528 extending from the central profile 527; the central profile 527 has a central curvature radius, and each of the first curved profiles 528 has a first curvature radius, the third curvature radius is smaller than the central curvature radius and larger than the first curvature radius. The central profile 527 in this embodiment is basically a plane, and the first curved profiles 528 are formed by extending to both sides along the plane.

[0061] In this embodiment, the inner surface 524 includes a third curved profile 525 that is basically spherical (symmetrical around the axis center where the focal center F1 is located), and the third curved profile 525 has a third radius of curvature, and the third radius of curvature is smaller than the second radius of curvature. As mentioned above, the inner surface 524 has a two-dimensional spatial structure (constituting a cavity for accommodating LED lamp beads), and the cavity on its inner surface is basically spherical, the mold structure is simple, and a one-time pressing molding method is adopted. The cavity surface is smooth, and a cavity that is compatible with the lamp beads can be formed on the substrate. At the same time, the structure of the lens cover is optimized, so that the lens cover can meet the light output requirements under different conditions.

[0062] It should be noted that the above-mentioned spherical cap shape can be understood as the shape of the small structure or the hemisphere left after a sphere is cut by a cutting plane perpendicular to the diameter. The shape of this part of the spherical cap is rotationally symmetric around the vertical diameter. This arrangement enables the inner surface to receive the light emitted by the LED lamp beads to the maximum extent.

[0063] Combination Figure 4 As shown, the outer edge of the third curved profile 525 is formed with an inclined flare 529 and extends to the plane where the substrate 51 is located. The inclined flare 529 is slightly larger than the maximum diameter of the third curved profile 525. The inclined flare 529 provides a guiding direction for the matching of the lamp beads and provides a guarantee for the adaptation of the lamp beads.

[0064] Specifically, the inclined expansion opening 529 has a two-dimensional shape, similar to a truncated cone structure, which is larger at the top and smaller at the bottom. The inclined expansion opening 529 is circular when viewed from above, and its depth is 0.1-0.5 mm.

[0065] exist Figure 2 In FIG. 5 , the optical lens element 52 has a substantially rectangular shape when viewed along the focal center F1 , but with rounded corners.

[0066] In some embodiments, the substrate 51 has a square outer contour and is provided with a circular avoidance groove 511, which is distributed in the array of optical lens elements 52. The avoidance groove 511 can provide a space for avoiding the screws for installing the lamp board 40. The depth of the avoidance groove 511 is adapted to the height of the lens element 52 to ensure that the light distribution is not affected after installation.

[0067] Furthermore, the lens element 52 has a length and a width (the optical lens element 52 has a substantially rectangular shape), and a distance D1 between two adjacent lens elements 52 in the length direction is smaller than a distance D2 between two adjacent lens elements 52 in the width direction. Figure 2 , the ratio between the distance D1 between two lens elements 52 adjacent in the length direction and the distance D2 between two lens elements 52 adjacent in the width direction is 1:3.

[0068] Combination Fig.11 As shown, the array of lens elements 52 provides the feasibility of light distribution for the light transmittance of LED lamp beads, so that the illumination range of the lamp is within the range of -60°-60°, meeting the needs of plant supplementary lighting; at the same time, the interference between adjacent lens elements 52 is small, and the influence between the lens elements 52 is reduced as much as possible.

[0069] The lamp of the present invention needs to be controlled by a controller, so two control box mounting grooves 512 are provided on the substrate 51 . The two control box mounting grooves 512 are respectively located on both sides of the lens element 52 array and away from the center of the substrate 51 .

[0070] Example 2

[0071] like Figures 6 to 8 As shown, the lens cover 50 with the lens element 52 of this embodiment includes: a substrate 51 ; and an optical lens element 52 extending from the substrate 51 and defining a focal center F1 , wherein the optical lens element 52 includes an outer surface 521 and an inner surface 524 .

[0072] A first longitudinal two-dimensional profile 526 (in the length direction of the lens element 52) ​​is provided at a cross section taken orthogonally to the width at the focal center F1. The first longitudinal two-dimensional profile 526 includes a central profile 527 and a pair of first curved profiles 528 extending from the central profile 527. The concave central profile 527 cooperates with the convex first curved profiles 528. Specifically, the central profile 527 is concave inwardly and the first curved profiles 528 are protruding outwardly to form a "peanut shape".

[0073] Furthermore, the inner surface 524 includes a third curved profile 525 that is substantially in the shape of a spherical cap. The third curved profile 525 has a third radius of curvature, and the third radius of curvature is smaller than the second radius of curvature.

[0074] exist Figure 7 In the embodiment, the lens element 52 has a length and a width, and a distance D1 between two adjacent lens elements 52 in the length direction is smaller than a distance D2 between two adjacent lens elements 52 in the width direction. Preferably, the ratio between the distance D1 between two adjacent lens elements 52 in the length direction and the distance D2 between two adjacent lens elements 52 in the width direction is 1:1-5. For example, in the present embodiment, the ratio between D1 and D2 is 1:1.5.

[0075] In the above structure, the center of the outer surface of the optical lens element 52 is concave to form an inverted cone-shaped diffusion portion, which increases the incident angle of light when projected onto the outer surface, thereby increasing the refraction angle when emitted from the light emitting surface, thereby achieving the effect of light diffusion. Fig.12As shown, the array of lens elements 52 provides the feasibility of light distribution for the light transmittance of LED lamp beads, so that the illumination range of the lamp is within the range of -75°-75°, meeting the needs of plant supplementary lighting; at the same time, the interference between adjacent lens elements 52 is small, and the influence between the lens elements 52 is reduced as much as possible.

[0076] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A lens cover having a lens element, comprising: substrate(51); and a plurality of arrays of optical lens elements (52) extending from the substrate (51) and defining a focal center, the optical lens elements (52) comprising an outer surface (521) and an inner surface (524); The outer surface (521) comprises: a first transverse two-dimensional profile (522) at a cross section taken orthogonally to the length at the focal center, the first transverse two-dimensional profile (522) comprising a pair of second curved profiles (523) extending from the focal center and each second curved profile (523) having a second radius of curvature; Characterized in that the inner surface (524) comprises a third curved profile (525) that is substantially spherical cap-shaped, the third curved profile (525) having a third radius of curvature, and the third radius of curvature is smaller than the second radius of curvature; The outer surface (521) further includes: a first longitudinal two-dimensional profile (526) at a cross section taken orthogonally to the width at the center of the focal point, the first longitudinal two-dimensional profile (526) including a central profile (527) and a pair of first curved profiles (528) extending from the central profile (527), the central profile (527) having a central radius of curvature, and the first curved profiles (528) each having a first radius of curvature, the third radius of curvature being smaller than the central radius of curvature and larger than the first radius of curvature; The ratio between the distance D1 between two lens elements (52) adjacent to each other in the length direction and the distance D2 between two lens elements (52) adjacent to each other in the width direction is 1:1-5.

2. The lens cover having a lens element according to claim 1, characterized in that: The outer surface (521) also includes: a first longitudinal two-dimensional profile (526) at a cross section taken orthogonally to the width at the center of the focal point, the first longitudinal two-dimensional profile (526) including a central profile (527) and a pair of first curved profiles (528) extending from the central profile (527), the central profile (527) being concave and cooperating with the first curved profiles (528) being convex.

3. The lens cover having a lens element according to claim 2, characterized in that: An outer edge of the third curved profile (525) is formed with an inclined flared opening (529) and extends to the plane where the base plate (51) is located.

4. The lens cover with a lens element according to any one of claims 1 to 3, characterized in that: The outer contour of the substrate (51) is square, and avoidance grooves (511) are provided thereon, wherein the avoidance grooves (511) are distributed in the array of optical lens elements (52).

5. The lens cover having a lens element according to claim 4, characterized in that: The lens element (52) has a length and a width, and a distance D1 between two adjacent lens elements (52) in the length direction is smaller than a distance D2 between two adjacent lens elements (52) in the width direction.

6. The lens cover having a lens element according to claim 5, characterized in that: At least one control box installation slot (512) is provided on the base plate (51).

7. A lighting module (20), characterized in that: include: Inner housing (30); A lamp board (40) having a plurality of LED lamp beads assembled with the inner housing (30); And a lens cover (50) according to any one of claims 1 to 6 covering the light board (40).

8. A lamp, characterized in that: include: An outer shell (10), and a lighting module (20) as claimed in claim 7 and placed on the outer shell (10).

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